Add missing comma to JenkinsFile #4141

Job	Run time
Run examples in 'session-example' on MySQL	1m 49s
Run examples in 'session-example' on PostgreSQL	1m 51s
Test with MariaDB	3m 21s
Test with MySQL	4m 17s
Run examples in 'native-sql-example' on PostgreSQL	1m 54s
Test with Java 17	3m 5s
Test with PostgreSQL	3m 21s
Test with Java 20	3m 11s
Test with MSSQLServer	3m 43s
Test with Java 21	3m 15s
Test with CockroachDB	6m 21s
Test with Java 23	3m 36s
Test with Db2	5m 22s
Test with Java 24-ea	3m 26s
Test with Oracle	4m 43s
Test with Java 25-ea	3m 15s
	56m 30s

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